If (a + b) = 10 and ab = 25 then find the value of ( a - b)

If x + y  = n

then , x - y  = \(\sqrt {n^2 - 4xy}\)

If a + b = 10

ab = 25

Then find the value of ( a - b)

If $(a + b)^2$ = 10

So,

a + b = 10

then x - y = $\sqrt {(10)^2 - 4 \times 25}$ = 0